<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
{{ abc }}
<div>
  <iframe src="http://127.0.0.1:5000/dash/" width=800 height=600 frameborder="0"></iframe>
  <hr/><a href="http://127.0.0.1:5000/dash/" target="_new">Open in new window</a> for http://127.0.0.1:5000/dash/
</div>
</body>
</html>